Cabbage can be developed at each growth stage, 6-7 leaves before the seedling stage is the most susceptible, this time is also an effective period of transmission of aphid transmission. During this period, the earlier the illness is felt, the heavier the disease, the greater the loss. Symptoms are that the veins of the heart are translucent at the beginning of the disease and chlorotic along the veins, followed by dark green and white mottled or mosaics, shrinkage deformities, sometimes dark brown necrotic spots on the petiole and veins, and severe wilting. Control methods: Use disease-resistant varieties and sow them at an appropriate period to ensure that there is a sufficient growth period for Chinese cabbage. In case of dry and early rain, pay attention to watering in the seedling stage to reduce the soil temperature and keep the roots strong. During the rosette period, the seedlings should be lightly or not seedlings. After the emergence of Chinese cabbage to the early 7-leaf stage, timely eradication of aphid seedlings, can be used per acre 25% pymetrozine wettable powder 16 grams of water spray 40 kg. In the initial stage of disease, spray 20% of virus A WP 500 times, or 15% of phytopathogenic emulsion 1000 times, spray once every 7-10 days, and spray 2-3 times. Soft rot generally occurs from the rosette stage to the heart-filling period. Caused by the damage of soft rot bacteria, when the temperature and humidity are high, the bacteria reproduce quickly and the disease is severe. Symptoms are the yellowish-infiltrated, water-soaked areas at the base of the cabbages that form in the early stages of disease. They gradually turn yellow-brown, showing slippery, soft rot, wilting leaves, rotted roots and odor. Control methods: cultivation of sorghum, good field drainage, ventilation and light transmission. Timely sowing to prevent premature aging. Long ridge short irrigation, timely drainage after the rain. Remove diseased plants before irrigation to reduce germ transmission. At the beginning of the disease, 72% of streptomycin can be sprayed with 1000 times of agricultural streak to spray spoiled plants and the surrounding petioles, so that the flower liquid flows into the cabbage core as much as possible. Generally, it is sprayed once every 7-10 days and sprayed 2-3 times. New Product Vape Pod,Battery Veiik Vape Pod,Battery 2Ml Electronic Cigarette,Pod System Vape Pod Shenzhen Wanna Technology Co.Ltd , https://www.veiikvape.com